/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCTransformed.xml -s ../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf -i ../../../trunk/examples/svcomp/loop-crafted/simple_array_index_value_2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-05ce600 [2022-02-23 16:02:34,856 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-23 16:02:34,883 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-23 16:02:34,911 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-02-23 16:02:34,946 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-02-23 16:02:34,947 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-02-23 16:02:34,947 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-02-23 16:02:34,948 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-02-23 16:02:34,959 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-23 16:02:34,960 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-23 16:02:34,961 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-23 16:02:34,961 INFO L138 SettingsManager]: * sizeof long=4 [2022-02-23 16:02:34,961 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-23 16:02:34,961 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-02-23 16:02:34,962 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-23 16:02:34,962 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-23 16:02:34,962 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-23 16:02:34,962 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-23 16:02:34,962 INFO L138 SettingsManager]: * sizeof long double=12 [2022-02-23 16:02:34,962 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-23 16:02:34,963 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-23 16:02:34,963 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-23 16:02:34,963 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-23 16:02:34,963 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-23 16:02:34,963 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-02-23 16:02:34,963 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-23 16:02:34,963 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-23 16:02:34,963 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-23 16:02:34,963 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-02-23 16:02:34,964 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-02-23 16:02:34,964 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_JORDAN WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-02-23 16:02:35,151 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-23 16:02:35,169 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-23 16:02:35,170 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-23 16:02:35,171 INFO L271 PluginConnector]: Initializing CDTParser... [2022-02-23 16:02:35,171 INFO L275 PluginConnector]: CDTParser initialized [2022-02-23 16:02:35,172 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-crafted/simple_array_index_value_2.i [2022-02-23 16:02:35,229 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/362efe11d/3f67aa79de0243629fd6b4a34b89872a/FLAG5cc39bb5d [2022-02-23 16:02:35,620 INFO L306 CDTParser]: Found 1 translation units. [2022-02-23 16:02:35,621 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-crafted/simple_array_index_value_2.i [2022-02-23 16:02:35,624 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/362efe11d/3f67aa79de0243629fd6b4a34b89872a/FLAG5cc39bb5d [2022-02-23 16:02:35,633 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/362efe11d/3f67aa79de0243629fd6b4a34b89872a [2022-02-23 16:02:35,635 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-23 16:02:35,636 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-02-23 16:02:35,637 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-02-23 16:02:35,637 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-02-23 16:02:35,651 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-02-23 16:02:35,651 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 04:02:35" (1/1) ... [2022-02-23 16:02:35,652 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@67e441ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 04:02:35, skipping insertion in model container [2022-02-23 16:02:35,652 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 04:02:35" (1/1) ... [2022-02-23 16:02:35,657 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-02-23 16:02:35,665 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-02-23 16:02:35,774 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-crafted/simple_array_index_value_2.i[919,932] [2022-02-23 16:02:35,794 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-23 16:02:35,801 INFO L203 MainTranslator]: Completed pre-run [2022-02-23 16:02:35,810 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-crafted/simple_array_index_value_2.i[919,932] [2022-02-23 16:02:35,819 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-23 16:02:35,828 INFO L208 MainTranslator]: Completed translation [2022-02-23 16:02:35,828 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 04:02:35 WrapperNode [2022-02-23 16:02:35,828 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-02-23 16:02:35,829 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-23 16:02:35,829 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-23 16:02:35,829 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-23 16:02:35,836 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 04:02:35" (1/1) ... [2022-02-23 16:02:35,836 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 04:02:35" (1/1) ... [2022-02-23 16:02:35,841 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 04:02:35" (1/1) ... [2022-02-23 16:02:35,841 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 04:02:35" (1/1) ... [2022-02-23 16:02:35,850 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 04:02:35" (1/1) ... [2022-02-23 16:02:35,853 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 04:02:35" (1/1) ... [2022-02-23 16:02:35,854 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 04:02:35" (1/1) ... [2022-02-23 16:02:35,858 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-23 16:02:35,859 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-23 16:02:35,859 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-23 16:02:35,859 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-23 16:02:35,860 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 04:02:35" (1/1) ... [2022-02-23 16:02:35,865 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-23 16:02:35,871 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 16:02:35,880 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-02-23 16:02:35,928 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-02-23 16:02:35,943 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-02-23 16:02:35,943 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-23 16:02:35,943 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-02-23 16:02:35,943 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-02-23 16:02:35,943 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-02-23 16:02:35,943 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-02-23 16:02:35,943 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-02-23 16:02:35,943 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-02-23 16:02:35,944 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-02-23 16:02:35,944 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-02-23 16:02:35,944 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-02-23 16:02:35,944 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-02-23 16:02:35,944 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-02-23 16:02:35,944 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-02-23 16:02:35,944 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2022-02-23 16:02:35,945 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-02-23 16:02:35,945 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-02-23 16:02:35,945 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-02-23 16:02:35,945 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-02-23 16:02:35,945 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-02-23 16:02:35,946 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-02-23 16:02:35,946 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-02-23 16:02:35,946 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-23 16:02:36,008 INFO L234 CfgBuilder]: Building ICFG [2022-02-23 16:02:36,010 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-23 16:02:36,124 INFO L275 CfgBuilder]: Performing block encoding [2022-02-23 16:02:36,133 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-23 16:02:36,133 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-02-23 16:02:36,134 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 04:02:36 BoogieIcfgContainer [2022-02-23 16:02:36,134 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-23 16:02:36,135 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-02-23 16:02:36,135 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-02-23 16:02:36,136 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-02-23 16:02:36,138 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 04:02:36" (1/1) ... [2022-02-23 16:02:36,147 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 23.02 04:02:36 BasicIcfg [2022-02-23 16:02:36,147 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-02-23 16:02:36,148 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-23 16:02:36,148 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-23 16:02:36,150 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-23 16:02:36,150 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.02 04:02:35" (1/4) ... [2022-02-23 16:02:36,150 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ba0ae4d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 04:02:36, skipping insertion in model container [2022-02-23 16:02:36,151 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 04:02:35" (2/4) ... [2022-02-23 16:02:36,151 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ba0ae4d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 04:02:36, skipping insertion in model container [2022-02-23 16:02:36,151 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 04:02:36" (3/4) ... [2022-02-23 16:02:36,151 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ba0ae4d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.02 04:02:36, skipping insertion in model container [2022-02-23 16:02:36,151 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 23.02 04:02:36" (4/4) ... [2022-02-23 16:02:36,152 INFO L111 eAbstractionObserver]: Analyzing ICFG simple_array_index_value_2.iJordan [2022-02-23 16:02:36,155 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-02-23 16:02:36,155 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-02-23 16:02:36,198 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-23 16:02:36,203 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=ForwardPredicates, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2022-02-23 16:02:36,203 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-02-23 16:02:36,210 INFO L276 IsEmpty]: Start isEmpty. Operand has 30 states, 20 states have (on average 1.35) internal successors, (27), 21 states have internal predecessors, (27), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-02-23 16:02:36,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-02-23 16:02:36,215 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 16:02:36,215 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 16:02:36,216 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 16:02:36,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 16:02:36,219 INFO L85 PathProgramCache]: Analyzing trace with hash -183287108, now seen corresponding path program 1 times [2022-02-23 16:02:36,224 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 16:02:36,225 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617915045] [2022-02-23 16:02:36,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 16:02:36,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 16:02:36,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:02:36,403 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 16:02:36,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:02:36,414 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 16:02:36,414 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 16:02:36,414 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617915045] [2022-02-23 16:02:36,415 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1617915045] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 16:02:36,415 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 16:02:36,415 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-23 16:02:36,416 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827001966] [2022-02-23 16:02:36,416 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 16:02:36,419 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-23 16:02:36,419 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 16:02:36,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-23 16:02:36,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-23 16:02:36,441 INFO L87 Difference]: Start difference. First operand has 30 states, 20 states have (on average 1.35) internal successors, (27), 21 states have internal predecessors, (27), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-23 16:02:36,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 16:02:36,532 INFO L93 Difference]: Finished difference Result 38 states and 41 transitions. [2022-02-23 16:02:36,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-23 16:02:36,534 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2022-02-23 16:02:36,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 16:02:36,538 INFO L225 Difference]: With dead ends: 38 [2022-02-23 16:02:36,538 INFO L226 Difference]: Without dead ends: 33 [2022-02-23 16:02:36,539 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-23 16:02:36,541 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 28 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-23 16:02:36,542 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 33 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-23 16:02:36,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-02-23 16:02:36,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 26. [2022-02-23 16:02:36,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 18 states have (on average 1.1111111111111112) internal successors, (20), 18 states have internal predecessors, (20), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-23 16:02:36,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2022-02-23 16:02:36,562 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 13 [2022-02-23 16:02:36,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 16:02:36,563 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2022-02-23 16:02:36,563 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-23 16:02:36,563 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2022-02-23 16:02:36,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-02-23 16:02:36,563 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 16:02:36,564 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 16:02:36,564 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-02-23 16:02:36,564 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 16:02:36,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 16:02:36,565 INFO L85 PathProgramCache]: Analyzing trace with hash 364957256, now seen corresponding path program 1 times [2022-02-23 16:02:36,565 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 16:02:36,565 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263578663] [2022-02-23 16:02:36,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 16:02:36,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 16:02:36,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:02:36,621 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 16:02:36,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:02:36,627 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-02-23 16:02:36,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:02:36,633 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 16:02:36,634 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 16:02:36,634 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263578663] [2022-02-23 16:02:36,634 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [263578663] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-23 16:02:36,634 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [732140473] [2022-02-23 16:02:36,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 16:02:36,634 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 16:02:36,634 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 16:02:36,636 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 16:02:36,637 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-02-23 16:02:36,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:02:36,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-23 16:02:36,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 16:02:36,920 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-02-23 16:02:37,067 INFO L356 Elim1Store]: treesize reduction 11, result has 21.4 percent of original size [2022-02-23 16:02:37,068 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 22 [2022-02-23 16:02:37,298 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 16:02:37,298 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 16:02:37,424 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 41 [2022-02-23 16:02:37,441 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-23 16:02:37,442 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 41 treesize of output 88 [2022-02-23 16:02:37,536 INFO L356 Elim1Store]: treesize reduction 14, result has 6.7 percent of original size [2022-02-23 16:02:37,538 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 336 treesize of output 315 [2022-02-23 16:02:37,833 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 16:02:37,834 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [732140473] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 16:02:37,834 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-23 16:02:37,834 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 11, 12] total 20 [2022-02-23 16:02:37,836 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384680278] [2022-02-23 16:02:37,838 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-23 16:02:37,839 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-23 16:02:37,843 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 16:02:37,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-23 16:02:37,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2022-02-23 16:02:37,846 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand has 20 states, 17 states have (on average 2.0) internal successors, (34), 15 states have internal predecessors, (34), 6 states have call successors, (8), 5 states have call predecessors, (8), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-02-23 16:02:38,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 16:02:38,188 INFO L93 Difference]: Finished difference Result 41 states and 46 transitions. [2022-02-23 16:02:38,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-23 16:02:38,189 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 17 states have (on average 2.0) internal successors, (34), 15 states have internal predecessors, (34), 6 states have call successors, (8), 5 states have call predecessors, (8), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 21 [2022-02-23 16:02:38,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 16:02:38,190 INFO L225 Difference]: With dead ends: 41 [2022-02-23 16:02:38,190 INFO L226 Difference]: Without dead ends: 41 [2022-02-23 16:02:38,190 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=126, Invalid=630, Unknown=0, NotChecked=0, Total=756 [2022-02-23 16:02:38,191 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 36 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 340 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 370 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 340 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-23 16:02:38,191 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 79 Invalid, 370 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 340 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-23 16:02:38,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-02-23 16:02:38,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 30. [2022-02-23 16:02:38,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 21 states have (on average 1.0952380952380953) internal successors, (23), 21 states have internal predecessors, (23), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-02-23 16:02:38,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2022-02-23 16:02:38,195 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 21 [2022-02-23 16:02:38,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 16:02:38,195 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2022-02-23 16:02:38,195 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 17 states have (on average 2.0) internal successors, (34), 15 states have internal predecessors, (34), 6 states have call successors, (8), 5 states have call predecessors, (8), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-02-23 16:02:38,195 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2022-02-23 16:02:38,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-23 16:02:38,196 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 16:02:38,196 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 16:02:38,214 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-02-23 16:02:38,407 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 16:02:38,407 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 16:02:38,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 16:02:38,408 INFO L85 PathProgramCache]: Analyzing trace with hash 1998589396, now seen corresponding path program 2 times [2022-02-23 16:02:38,408 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 16:02:38,408 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192219187] [2022-02-23 16:02:38,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 16:02:38,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 16:02:38,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:02:38,503 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 16:02:38,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:02:38,519 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-02-23 16:02:38,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:02:38,526 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-02-23 16:02:38,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:02:38,530 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-02-23 16:02:38,531 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 16:02:38,531 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192219187] [2022-02-23 16:02:38,531 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1192219187] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-23 16:02:38,531 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [760361595] [2022-02-23 16:02:38,531 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-23 16:02:38,531 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 16:02:38,531 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 16:02:38,536 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 16:02:38,539 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-02-23 16:02:38,573 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-23 16:02:38,573 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-23 16:02:38,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 30 conjunts are in the unsatisfiable core [2022-02-23 16:02:38,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 16:02:38,625 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-02-23 16:02:38,860 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-02-23 16:02:38,861 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-02-23 16:02:39,077 INFO L356 Elim1Store]: treesize reduction 11, result has 21.4 percent of original size [2022-02-23 16:02:39,077 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 22 [2022-02-23 16:02:39,200 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-23 16:02:39,200 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 16:02:42,883 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [760361595] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-23 16:02:42,883 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-23 16:02:42,884 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 16] total 19 [2022-02-23 16:02:42,884 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643671047] [2022-02-23 16:02:42,884 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-23 16:02:42,884 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-23 16:02:42,884 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 16:02:42,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-23 16:02:42,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=470, Unknown=2, NotChecked=0, Total=552 [2022-02-23 16:02:42,885 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand has 19 states, 17 states have (on average 2.0) internal successors, (34), 14 states have internal predecessors, (34), 6 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2022-02-23 16:02:43,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 16:02:43,392 INFO L93 Difference]: Finished difference Result 55 states and 60 transitions. [2022-02-23 16:02:43,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-02-23 16:02:43,392 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 17 states have (on average 2.0) internal successors, (34), 14 states have internal predecessors, (34), 6 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) Word has length 29 [2022-02-23 16:02:43,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 16:02:43,394 INFO L225 Difference]: With dead ends: 55 [2022-02-23 16:02:43,394 INFO L226 Difference]: Without dead ends: 55 [2022-02-23 16:02:43,394 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 28 SyntacticMatches, 5 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 501 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=296, Invalid=1682, Unknown=2, NotChecked=0, Total=1980 [2022-02-23 16:02:43,395 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 56 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 216 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 339 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 82 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-23 16:02:43,396 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 74 Invalid, 339 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 216 Invalid, 0 Unknown, 82 Unchecked, 0.1s Time] [2022-02-23 16:02:43,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-02-23 16:02:43,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 44. [2022-02-23 16:02:43,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 31 states have (on average 1.064516129032258) internal successors, (33), 32 states have internal predecessors, (33), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2022-02-23 16:02:43,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 46 transitions. [2022-02-23 16:02:43,400 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 46 transitions. Word has length 29 [2022-02-23 16:02:43,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 16:02:43,400 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 46 transitions. [2022-02-23 16:02:43,400 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 17 states have (on average 2.0) internal successors, (34), 14 states have internal predecessors, (34), 6 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2022-02-23 16:02:43,401 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 46 transitions. [2022-02-23 16:02:43,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-02-23 16:02:43,401 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 16:02:43,401 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 16:02:43,426 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-02-23 16:02:43,623 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-02-23 16:02:43,624 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 16:02:43,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 16:02:43,624 INFO L85 PathProgramCache]: Analyzing trace with hash 483843889, now seen corresponding path program 1 times [2022-02-23 16:02:43,624 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 16:02:43,624 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102114380] [2022-02-23 16:02:43,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 16:02:43,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 16:02:43,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:02:43,733 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 16:02:43,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:02:43,740 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-02-23 16:02:43,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:02:43,757 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-02-23 16:02:43,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:02:43,770 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-02-23 16:02:43,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:02:43,777 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-02-23 16:02:43,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:02:43,782 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-02-23 16:02:43,782 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 16:02:43,783 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102114380] [2022-02-23 16:02:43,783 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [102114380] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-23 16:02:43,783 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1463068238] [2022-02-23 16:02:43,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 16:02:43,783 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 16:02:43,783 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 16:02:43,796 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 16:02:43,830 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-02-23 16:02:43,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:02:43,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 34 conjunts are in the unsatisfiable core [2022-02-23 16:02:43,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 16:02:43,950 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 53 [2022-02-23 16:02:43,957 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 95 [2022-02-23 16:02:43,998 INFO L356 Elim1Store]: treesize reduction 41, result has 2.4 percent of original size [2022-02-23 16:02:43,998 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 100 treesize of output 28 [2022-02-23 16:02:48,578 INFO L356 Elim1Store]: treesize reduction 39, result has 39.1 percent of original size [2022-02-23 16:02:48,578 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 56 treesize of output 57 [2022-02-23 16:02:51,607 INFO L356 Elim1Store]: treesize reduction 17, result has 15.0 percent of original size [2022-02-23 16:02:51,607 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 21 [2022-02-23 16:02:51,706 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 11 proven. 17 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-23 16:02:51,706 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 16:02:56,083 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1463068238] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-23 16:02:56,083 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-23 16:02:56,083 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 18] total 21 [2022-02-23 16:02:56,083 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224193208] [2022-02-23 16:02:56,083 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-23 16:02:56,083 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-23 16:02:56,084 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 16:02:56,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-23 16:02:56,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=599, Unknown=4, NotChecked=0, Total=702 [2022-02-23 16:02:56,084 INFO L87 Difference]: Start difference. First operand 44 states and 46 transitions. Second operand has 21 states, 19 states have (on average 2.526315789473684) internal successors, (48), 17 states have internal predecessors, (48), 8 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) [2022-02-23 16:02:56,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 16:02:56,583 INFO L93 Difference]: Finished difference Result 66 states and 69 transitions. [2022-02-23 16:02:56,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-02-23 16:02:56,584 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 2.526315789473684) internal successors, (48), 17 states have internal predecessors, (48), 8 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) Word has length 45 [2022-02-23 16:02:56,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 16:02:56,585 INFO L225 Difference]: With dead ends: 66 [2022-02-23 16:02:56,585 INFO L226 Difference]: Without dead ends: 66 [2022-02-23 16:02:56,585 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 48 SyntacticMatches, 6 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 348 ImplicationChecksByTransitivity, 11.4s TimeCoverageRelationStatistics Valid=203, Invalid=1353, Unknown=4, NotChecked=0, Total=1560 [2022-02-23 16:02:56,586 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 41 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 327 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 138 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-23 16:02:56,586 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 151 Invalid, 327 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 169 Invalid, 0 Unknown, 138 Unchecked, 0.1s Time] [2022-02-23 16:02:56,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-02-23 16:02:56,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 60. [2022-02-23 16:02:56,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 43 states have (on average 1.0465116279069768) internal successors, (45), 44 states have internal predecessors, (45), 9 states have call successors, (9), 8 states have call predecessors, (9), 7 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-23 16:02:56,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 62 transitions. [2022-02-23 16:02:56,591 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 62 transitions. Word has length 45 [2022-02-23 16:02:56,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 16:02:56,591 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 62 transitions. [2022-02-23 16:02:56,591 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 2.526315789473684) internal successors, (48), 17 states have internal predecessors, (48), 8 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) [2022-02-23 16:02:56,591 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 62 transitions. [2022-02-23 16:02:56,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-02-23 16:02:56,592 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 16:02:56,592 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 16:02:56,610 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-02-23 16:02:56,807 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 16:02:56,808 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 16:02:56,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 16:02:56,808 INFO L85 PathProgramCache]: Analyzing trace with hash -926913650, now seen corresponding path program 2 times [2022-02-23 16:02:56,808 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 16:02:56,808 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346155620] [2022-02-23 16:02:56,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 16:02:56,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 16:02:56,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:02:56,912 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 16:02:56,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:02:56,916 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-02-23 16:02:56,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:02:56,924 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-02-23 16:02:56,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:02:56,929 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-02-23 16:02:56,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:02:56,936 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-02-23 16:02:56,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:02:56,940 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-02-23 16:02:56,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:02:56,945 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-02-23 16:02:56,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:02:56,949 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 4 proven. 28 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-02-23 16:02:56,949 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 16:02:56,952 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346155620] [2022-02-23 16:02:56,952 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [346155620] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-23 16:02:56,952 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [796291295] [2022-02-23 16:02:56,952 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-23 16:02:56,952 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 16:02:56,952 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 16:02:56,968 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 16:02:56,969 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-02-23 16:02:57,016 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-23 16:02:57,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-23 16:02:57,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 38 conjunts are in the unsatisfiable core [2022-02-23 16:02:57,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 16:02:57,118 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 53 [2022-02-23 16:02:57,122 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 95 [2022-02-23 16:02:57,155 INFO L356 Elim1Store]: treesize reduction 41, result has 2.4 percent of original size [2022-02-23 16:02:57,156 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 100 treesize of output 28 [2022-02-23 16:03:03,244 INFO L356 Elim1Store]: treesize reduction 39, result has 39.1 percent of original size [2022-02-23 16:03:03,245 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 56 treesize of output 57 [2022-02-23 16:03:04,540 INFO L356 Elim1Store]: treesize reduction 17, result has 15.0 percent of original size [2022-02-23 16:03:04,540 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 21 [2022-02-23 16:03:04,642 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 18 proven. 38 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-02-23 16:03:04,643 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 16:03:12,902 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [796291295] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-23 16:03:12,902 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-23 16:03:12,902 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 20] total 23 [2022-02-23 16:03:12,902 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66707713] [2022-02-23 16:03:12,902 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-23 16:03:12,904 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-23 16:03:12,904 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 16:03:12,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-23 16:03:12,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=747, Unknown=10, NotChecked=0, Total=870 [2022-02-23 16:03:12,904 INFO L87 Difference]: Start difference. First operand 60 states and 62 transitions. Second operand has 23 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 19 states have internal predecessors, (54), 10 states have call successors, (13), 5 states have call predecessors, (13), 4 states have return successors, (10), 10 states have call predecessors, (10), 9 states have call successors, (10) [2022-02-23 16:03:15,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 16:03:15,619 INFO L93 Difference]: Finished difference Result 86 states and 90 transitions. [2022-02-23 16:03:15,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-02-23 16:03:15,619 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 19 states have internal predecessors, (54), 10 states have call successors, (13), 5 states have call predecessors, (13), 4 states have return successors, (10), 10 states have call predecessors, (10), 9 states have call successors, (10) Word has length 61 [2022-02-23 16:03:15,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 16:03:15,621 INFO L225 Difference]: With dead ends: 86 [2022-02-23 16:03:15,621 INFO L226 Difference]: Without dead ends: 86 [2022-02-23 16:03:15,621 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 72 SyntacticMatches, 8 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 450 ImplicationChecksByTransitivity, 17.0s TimeCoverageRelationStatistics Valid=236, Invalid=1733, Unknown=11, NotChecked=0, Total=1980 [2022-02-23 16:03:15,622 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 56 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 303 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 473 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 303 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 139 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-23 16:03:15,622 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 190 Invalid, 473 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 303 Invalid, 0 Unknown, 139 Unchecked, 0.2s Time] [2022-02-23 16:03:15,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-02-23 16:03:15,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 76. [2022-02-23 16:03:15,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 55 states have (on average 1.0363636363636364) internal successors, (57), 56 states have internal predecessors, (57), 11 states have call successors, (11), 10 states have call predecessors, (11), 9 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2022-02-23 16:03:15,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 78 transitions. [2022-02-23 16:03:15,627 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 78 transitions. Word has length 61 [2022-02-23 16:03:15,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 16:03:15,627 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 78 transitions. [2022-02-23 16:03:15,627 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 19 states have internal predecessors, (54), 10 states have call successors, (13), 5 states have call predecessors, (13), 4 states have return successors, (10), 10 states have call predecessors, (10), 9 states have call successors, (10) [2022-02-23 16:03:15,628 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 78 transitions. [2022-02-23 16:03:15,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-02-23 16:03:15,628 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 16:03:15,629 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 16:03:15,646 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-02-23 16:03:15,845 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 16:03:15,845 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 16:03:15,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 16:03:15,846 INFO L85 PathProgramCache]: Analyzing trace with hash -635325717, now seen corresponding path program 3 times [2022-02-23 16:03:15,846 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 16:03:15,846 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61476470] [2022-02-23 16:03:15,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 16:03:15,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 16:03:15,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:03:15,929 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 16:03:15,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:03:15,934 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-02-23 16:03:15,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:03:15,938 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-02-23 16:03:15,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:03:15,941 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-02-23 16:03:15,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:03:15,944 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-02-23 16:03:15,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:03:15,948 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-02-23 16:03:15,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:03:15,951 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-02-23 16:03:15,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:03:15,954 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-02-23 16:03:15,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:03:15,956 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-02-23 16:03:15,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:03:15,959 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 6 proven. 45 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2022-02-23 16:03:15,959 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 16:03:15,959 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61476470] [2022-02-23 16:03:15,959 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [61476470] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-23 16:03:15,959 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1366089444] [2022-02-23 16:03:15,959 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-23 16:03:15,959 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 16:03:15,960 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 16:03:15,961 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 16:03:15,965 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-02-23 16:03:16,408 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-02-23 16:03:16,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-23 16:03:16,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 55 conjunts are in the unsatisfiable core [2022-02-23 16:03:16,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 16:03:16,571 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 53 [2022-02-23 16:03:16,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-23 16:03:16,577 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 95 [2022-02-23 16:03:16,856 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 104 treesize of output 95 [2022-02-23 16:03:16,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-23 16:03:16,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-23 16:03:16,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-23 16:03:16,862 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 94 treesize of output 143 [2022-02-23 16:03:16,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-23 16:03:16,902 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 102 treesize of output 30 [2022-02-23 16:03:17,018 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 25 proven. 45 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-02-23 16:03:17,019 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 16:03:19,783 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 41 [2022-02-23 16:03:19,787 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-23 16:03:19,821 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-23 16:03:19,821 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 41 treesize of output 88 [2022-02-23 16:03:19,831 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-23 16:03:19,832 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 4 [2022-02-23 16:03:19,861 INFO L356 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2022-02-23 16:03:19,862 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 10 [2022-02-23 16:03:20,184 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 6 proven. 63 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-02-23 16:03:20,185 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1366089444] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 16:03:20,185 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-23 16:03:20,185 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 17, 21] total 43 [2022-02-23 16:03:20,185 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753032217] [2022-02-23 16:03:20,185 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-23 16:03:20,185 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-02-23 16:03:20,185 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 16:03:20,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-02-23 16:03:20,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=264, Invalid=1542, Unknown=0, NotChecked=0, Total=1806 [2022-02-23 16:03:20,187 INFO L87 Difference]: Start difference. First operand 76 states and 78 transitions. Second operand has 43 states, 42 states have (on average 2.0952380952380953) internal successors, (88), 38 states have internal predecessors, (88), 21 states have call successors, (24), 5 states have call predecessors, (24), 4 states have return successors, (21), 20 states have call predecessors, (21), 20 states have call successors, (21) [2022-02-23 16:03:26,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 16:03:26,027 INFO L93 Difference]: Finished difference Result 192 states and 224 transitions. [2022-02-23 16:03:26,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-02-23 16:03:26,028 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 42 states have (on average 2.0952380952380953) internal successors, (88), 38 states have internal predecessors, (88), 21 states have call successors, (24), 5 states have call predecessors, (24), 4 states have return successors, (21), 20 states have call predecessors, (21), 20 states have call successors, (21) Word has length 77 [2022-02-23 16:03:26,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 16:03:26,029 INFO L225 Difference]: With dead ends: 192 [2022-02-23 16:03:26,030 INFO L226 Difference]: Without dead ends: 192 [2022-02-23 16:03:26,031 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 138 SyntacticMatches, 2 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1956 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=1059, Invalid=6081, Unknown=0, NotChecked=0, Total=7140 [2022-02-23 16:03:26,032 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 371 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 1811 mSolverCounterSat, 448 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 371 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 2566 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 448 IncrementalHoareTripleChecker+Valid, 1811 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 307 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-02-23 16:03:26,032 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [371 Valid, 132 Invalid, 2566 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [448 Valid, 1811 Invalid, 0 Unknown, 307 Unchecked, 2.0s Time] [2022-02-23 16:03:26,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2022-02-23 16:03:26,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 127. [2022-02-23 16:03:26,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 93 states have (on average 1.086021505376344) internal successors, (101), 95 states have internal predecessors, (101), 22 states have call successors, (22), 12 states have call predecessors, (22), 11 states have return successors, (21), 19 states have call predecessors, (21), 21 states have call successors, (21) [2022-02-23 16:03:26,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 144 transitions. [2022-02-23 16:03:26,048 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 144 transitions. Word has length 77 [2022-02-23 16:03:26,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 16:03:26,048 INFO L470 AbstractCegarLoop]: Abstraction has 127 states and 144 transitions. [2022-02-23 16:03:26,048 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 42 states have (on average 2.0952380952380953) internal successors, (88), 38 states have internal predecessors, (88), 21 states have call successors, (24), 5 states have call predecessors, (24), 4 states have return successors, (21), 20 states have call predecessors, (21), 20 states have call successors, (21) [2022-02-23 16:03:26,049 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 144 transitions. [2022-02-23 16:03:26,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-02-23 16:03:26,050 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 16:03:26,050 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 16:03:26,069 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-02-23 16:03:26,250 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 16:03:26,251 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 16:03:26,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 16:03:26,251 INFO L85 PathProgramCache]: Analyzing trace with hash 994030920, now seen corresponding path program 4 times [2022-02-23 16:03:26,251 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 16:03:26,251 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670982313] [2022-02-23 16:03:26,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 16:03:26,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 16:03:26,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:03:26,349 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 16:03:26,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:03:26,352 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-02-23 16:03:26,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:03:26,355 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-02-23 16:03:26,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:03:26,359 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-02-23 16:03:26,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:03:26,362 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-02-23 16:03:26,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:03:26,364 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-02-23 16:03:26,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:03:26,368 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-02-23 16:03:26,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:03:26,370 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-02-23 16:03:26,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:03:26,372 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-02-23 16:03:26,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:03:26,374 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2022-02-23 16:03:26,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:03:26,377 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2022-02-23 16:03:26,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:03:26,384 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 8 proven. 66 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2022-02-23 16:03:26,384 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 16:03:26,384 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670982313] [2022-02-23 16:03:26,384 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1670982313] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-23 16:03:26,384 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1922036286] [2022-02-23 16:03:26,384 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-23 16:03:26,384 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 16:03:26,384 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 16:03:26,385 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 16:03:26,386 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-02-23 16:03:26,946 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-23 16:03:26,946 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-23 16:03:26,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 15 conjunts are in the unsatisfiable core [2022-02-23 16:03:26,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 16:03:27,111 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2022-02-23 16:03:27,112 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 16:03:27,317 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 8 proven. 66 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2022-02-23 16:03:27,317 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1922036286] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 16:03:27,317 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-23 16:03:27,317 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 18 [2022-02-23 16:03:27,318 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974376983] [2022-02-23 16:03:27,318 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-23 16:03:27,318 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-23 16:03:27,318 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 16:03:27,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-23 16:03:27,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=210, Unknown=0, NotChecked=0, Total=306 [2022-02-23 16:03:27,319 INFO L87 Difference]: Start difference. First operand 127 states and 144 transitions. Second operand has 18 states, 18 states have (on average 3.3333333333333335) internal successors, (60), 17 states have internal predecessors, (60), 14 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (15), 14 states have call predecessors, (15), 14 states have call successors, (15) [2022-02-23 16:03:28,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 16:03:28,427 INFO L93 Difference]: Finished difference Result 159 states and 179 transitions. [2022-02-23 16:03:28,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-23 16:03:28,427 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.3333333333333335) internal successors, (60), 17 states have internal predecessors, (60), 14 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (15), 14 states have call predecessors, (15), 14 states have call successors, (15) Word has length 93 [2022-02-23 16:03:28,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 16:03:28,430 INFO L225 Difference]: With dead ends: 159 [2022-02-23 16:03:28,430 INFO L226 Difference]: Without dead ends: 159 [2022-02-23 16:03:28,430 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 199 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=299, Invalid=693, Unknown=0, NotChecked=0, Total=992 [2022-02-23 16:03:28,432 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 207 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 722 mSolverCounterSat, 215 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 937 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 215 IncrementalHoareTripleChecker+Valid, 722 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-23 16:03:28,432 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [207 Valid, 79 Invalid, 937 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [215 Valid, 722 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-23 16:03:28,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2022-02-23 16:03:28,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 116. [2022-02-23 16:03:28,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 85 states have (on average 1.0235294117647058) internal successors, (87), 86 states have internal predecessors, (87), 20 states have call successors, (20), 11 states have call predecessors, (20), 10 states have return successors, (19), 18 states have call predecessors, (19), 19 states have call successors, (19) [2022-02-23 16:03:28,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 126 transitions. [2022-02-23 16:03:28,440 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 126 transitions. Word has length 93 [2022-02-23 16:03:28,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 16:03:28,440 INFO L470 AbstractCegarLoop]: Abstraction has 116 states and 126 transitions. [2022-02-23 16:03:28,440 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.3333333333333335) internal successors, (60), 17 states have internal predecessors, (60), 14 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (15), 14 states have call predecessors, (15), 14 states have call successors, (15) [2022-02-23 16:03:28,440 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 126 transitions. [2022-02-23 16:03:28,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2022-02-23 16:03:28,442 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 16:03:28,442 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 16:03:28,460 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-02-23 16:03:28,647 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 16:03:28,648 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 16:03:28,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 16:03:28,648 INFO L85 PathProgramCache]: Analyzing trace with hash 1349749463, now seen corresponding path program 5 times [2022-02-23 16:03:28,648 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 16:03:28,648 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48303029] [2022-02-23 16:03:28,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 16:03:28,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 16:03:28,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:03:28,903 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 16:03:28,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:03:28,916 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-02-23 16:03:28,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:03:28,920 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-02-23 16:03:28,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:03:28,923 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-02-23 16:03:28,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:03:28,937 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-02-23 16:03:28,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:03:28,940 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-02-23 16:03:28,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:03:28,943 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-02-23 16:03:28,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:03:28,946 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-02-23 16:03:28,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:03:28,949 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-02-23 16:03:28,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:03:28,954 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-02-23 16:03:28,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:03:28,965 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-02-23 16:03:28,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:03:28,968 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-02-23 16:03:28,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:03:28,972 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2022-02-23 16:03:28,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:03:28,976 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2022-02-23 16:03:28,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:03:28,982 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2022-02-23 16:03:28,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:03:28,986 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2022-02-23 16:03:28,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:03:28,989 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 129 [2022-02-23 16:03:28,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:03:28,991 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 137 [2022-02-23 16:03:28,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:03:28,993 INFO L134 CoverageAnalysis]: Checked inductivity of 778 backedges. 6 proven. 378 refuted. 0 times theorem prover too weak. 394 trivial. 0 not checked. [2022-02-23 16:03:28,993 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 16:03:28,993 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48303029] [2022-02-23 16:03:28,993 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [48303029] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-23 16:03:28,993 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1699060384] [2022-02-23 16:03:28,994 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-23 16:03:28,994 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 16:03:28,994 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 16:03:28,995 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 16:03:29,043 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-02-23 16:04:11,842 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2022-02-23 16:04:11,842 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-23 16:04:11,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-23 16:04:11,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 16:04:12,248 INFO L134 CoverageAnalysis]: Checked inductivity of 778 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2022-02-23 16:04:12,248 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 16:04:12,861 INFO L134 CoverageAnalysis]: Checked inductivity of 778 backedges. 6 proven. 378 refuted. 0 times theorem prover too weak. 394 trivial. 0 not checked. [2022-02-23 16:04:12,861 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1699060384] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 16:04:12,861 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-23 16:04:12,861 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 34 [2022-02-23 16:04:12,862 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523619571] [2022-02-23 16:04:12,862 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-23 16:04:12,862 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-02-23 16:04:12,862 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 16:04:12,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-02-23 16:04:12,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=320, Invalid=802, Unknown=0, NotChecked=0, Total=1122 [2022-02-23 16:04:12,863 INFO L87 Difference]: Start difference. First operand 116 states and 126 transitions. Second operand has 34 states, 34 states have (on average 3.176470588235294) internal successors, (108), 33 states have internal predecessors, (108), 30 states have call successors, (33), 3 states have call predecessors, (33), 2 states have return successors, (31), 30 states have call predecessors, (31), 30 states have call successors, (31) [2022-02-23 16:04:30,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 16:04:30,872 INFO L93 Difference]: Finished difference Result 287 states and 339 transitions. [2022-02-23 16:04:30,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-02-23 16:04:30,873 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 3.176470588235294) internal successors, (108), 33 states have internal predecessors, (108), 30 states have call successors, (33), 3 states have call predecessors, (33), 2 states have return successors, (31), 30 states have call predecessors, (31), 30 states have call successors, (31) Word has length 149 [2022-02-23 16:04:30,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 16:04:30,876 INFO L225 Difference]: With dead ends: 287 [2022-02-23 16:04:30,876 INFO L226 Difference]: Without dead ends: 287 [2022-02-23 16:04:30,877 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 380 GetRequests, 317 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 484 ImplicationChecksByTransitivity, 16.0s TimeCoverageRelationStatistics Valid=1115, Invalid=2917, Unknown=0, NotChecked=0, Total=4032 [2022-02-23 16:04:30,878 INFO L933 BasicCegarLoop]: 61 mSDtfsCounter, 705 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 2879 mSolverCounterSat, 748 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 705 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 3627 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 748 IncrementalHoareTripleChecker+Valid, 2879 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-02-23 16:04:30,878 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [705 Valid, 148 Invalid, 3627 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [748 Valid, 2879 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-02-23 16:04:30,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2022-02-23 16:04:30,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 180. [2022-02-23 16:04:30,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 133 states have (on average 1.0150375939849625) internal successors, (135), 134 states have internal predecessors, (135), 36 states have call successors, (36), 11 states have call predecessors, (36), 10 states have return successors, (35), 34 states have call predecessors, (35), 35 states have call successors, (35) [2022-02-23 16:04:30,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 206 transitions. [2022-02-23 16:04:30,894 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 206 transitions. Word has length 149 [2022-02-23 16:04:30,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 16:04:30,894 INFO L470 AbstractCegarLoop]: Abstraction has 180 states and 206 transitions. [2022-02-23 16:04:30,895 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 3.176470588235294) internal successors, (108), 33 states have internal predecessors, (108), 30 states have call successors, (33), 3 states have call predecessors, (33), 2 states have return successors, (31), 30 states have call predecessors, (31), 30 states have call successors, (31) [2022-02-23 16:04:30,895 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 206 transitions. [2022-02-23 16:04:30,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 278 [2022-02-23 16:04:30,897 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 16:04:30,897 INFO L514 BasicCegarLoop]: trace histogram [30, 30, 30, 30, 30, 30, 30, 30, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 16:04:30,914 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-02-23 16:04:31,107 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 16:04:31,109 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 16:04:31,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 16:04:31,110 INFO L85 PathProgramCache]: Analyzing trace with hash -1018698857, now seen corresponding path program 6 times [2022-02-23 16:04:31,110 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 16:04:31,110 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862836975] [2022-02-23 16:04:31,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 16:04:31,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 16:04:31,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:04:31,808 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 16:04:31,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:04:31,811 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-02-23 16:04:31,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:04:31,814 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-02-23 16:04:31,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:04:31,816 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-02-23 16:04:31,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:04:31,819 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-02-23 16:04:31,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:04:31,822 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-02-23 16:04:31,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:04:31,825 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-02-23 16:04:31,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:04:31,829 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-02-23 16:04:31,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:04:31,833 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-02-23 16:04:31,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:04:31,837 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-02-23 16:04:31,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:04:31,844 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-02-23 16:04:31,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:04:31,847 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-02-23 16:04:31,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:04:31,851 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2022-02-23 16:04:31,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:04:31,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2022-02-23 16:04:31,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:04:31,858 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2022-02-23 16:04:31,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:04:31,864 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2022-02-23 16:04:31,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:04:31,870 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2022-02-23 16:04:31,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:04:31,873 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2022-02-23 16:04:31,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:04:31,877 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 143 [2022-02-23 16:04:31,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:04:31,881 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 151 [2022-02-23 16:04:31,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:04:31,885 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 159 [2022-02-23 16:04:31,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:04:31,889 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 167 [2022-02-23 16:04:31,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:04:31,892 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2022-02-23 16:04:31,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:04:31,895 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 183 [2022-02-23 16:04:31,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:04:31,897 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 191 [2022-02-23 16:04:31,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:04:31,899 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 199 [2022-02-23 16:04:31,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:04:31,901 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 207 [2022-02-23 16:04:31,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:04:31,904 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 215 [2022-02-23 16:04:31,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:04:31,907 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 223 [2022-02-23 16:04:31,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:04:31,909 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 231 [2022-02-23 16:04:31,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:04:31,912 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 239 [2022-02-23 16:04:31,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:04:31,915 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 249 [2022-02-23 16:04:31,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:04:31,916 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 257 [2022-02-23 16:04:31,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:04:31,918 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 265 [2022-02-23 16:04:31,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:04:31,920 INFO L134 CoverageAnalysis]: Checked inductivity of 3546 backedges. 6 proven. 1770 refuted. 0 times theorem prover too weak. 1770 trivial. 0 not checked. [2022-02-23 16:04:31,921 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 16:04:31,921 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862836975] [2022-02-23 16:04:31,921 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1862836975] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-23 16:04:31,921 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [226166177] [2022-02-23 16:04:31,921 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-23 16:04:31,922 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 16:04:31,922 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 16:04:31,948 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 16:04:31,979 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process